Boot and shoe crimping machine



(No Model.)

J, W. D. FIFIELD.

BOOT AND SHOE ORIMPING MACHINE.

No. 248,438. n Patented Oct. 18,1881.

UNITED STATES ATnNT Trice,

BOOT AND SHOE ORIIVIPING MACHINE. v

SPECIFICATION forming part of Letters Patent No. 248,438, dated October18, 1881.

Application lcd August 8,1881. (No model.)

To all whom 'it may concern:

Be it known that I, JOHN W. D. FlFIELD, of North Brookfield, county ofWorcester and State of Massachusetts, have invented a new and usefulImprovement in Boot and Shoe Crimping-Machines, ot which the following`description, in connection with the accompanyin g dra-win gs, is aspecification.

My invention in crimping-machines for the fronts of boots and Vamps ofshoesconsists in a form and jaws combined with right and left h andactuating-screws, to cause the form and jaws to simultaneously movetoward or from each other; also, in a pair of jaws, each supported atbut one end upon a traveling nut, the end of each jaw not so connectedwith a nu't being attached in ayielding manner to the end of theopposite jaw.

Figure l represents, in side elevation, a crimping-machine embodying myinvention, the forni being fully raised and the jaws fully lowered; andFig. 2 a section on the dotted line a: x, Fig. l.

The base A of the machine has two upA right standards, c a', curved attop to hold the upper ends ot' two long screws, B B', having their lowerends iitted to turn in suitable footsteps or bearings. (Shown in dottedlines, Fig. l, on the base A.) These screws from at or near the middleof their length are threaded reversely in opposite directions-that is,onehalf of the screw has a right-hand and the other half a left-handthread. The left-hand threaded parts 2 of the screws enter the threadedsleeves o of the cross-bar o, which carries the form O, while theright-hand threaded parts 3 enter the nuts el, having outwardlyextendedarms, as shown clearly in Fig. 2, upon one of which at d is pivoted thejaw e, while upon the arm of the other nut at Z2 is pivoted the oppositeend of the other jaw c2. The end of jaw e not pivoted upon the nut d isconnected with that end of jaw c2 which is pivoted to a nut, d, by meansof a b0lt,f, surrounded by a spiral spring, f. The end of jaw e2 whichis not pivoted to one of the said nuts is joined by a bolt, g, with theend ofjaw e beyond its connection with one ofthe nuts d, the said bolthaving a spring, g.

The springs f g on these boltsfg keep the jaws e e2 pressed toward eachother and permit them to yield or separate a little as the form C with aboot front or shoe upper or quarter is made to pass into the spacebetween the jaws.

The active force of the springs may be regulated by the thumb-nuts fZg2.

The adjusting-screws h h regulate the space between the jaws in theirclosed position.

The screw B has a bevel-gear, l, and screw B', a bevel-gear, l2, of samesize, which are engaged and driven bythe bevel-gears m m2 on the shaftm3, it having on it a toothed gear, n, set in motion by a gear, n', onthe main driven shaft n2, provided at one end with a set of one looseand two fast pulleys, which, in practice, are driven alternately one byan open and the other by a crossed belt controlled by a beltshipper, allof usual construction, whereby the main driven shaft n2 may be revolvedfor a proper length ot' time in one, and then by shitting the belts inan opposite direction to act'uate the screws B B first in one and thenin the other direction, and cause the form and jaws to approach and theform to pass into and between the jaws, and then to recede or move inopposite directions into the position, Fig. l.

The mechanism so far described makes a very simple, cheap, and effectivecx-impingmachine. l

If the screws B B had threads running in but one direction they could bemade to move either the form or thejaws, one or the other remaining atrest; but such construction would be wasteful of time.

I claim- 1. A crimping-machine composed of a form and jaws and twoscrews in engagement therewith, each provided with right and left handthreads, whereby the jaws and form are simultaneously' moved toward andthen away from each other, substantially as described.

2. The jaws c c2, each pivoted at one end upon traveling nuts ot' thescrews B B', the free end of each jaw being connected with the pivotedend ofthe otherjaw in a yielding manner, to permit the jaws to separateas the form and leather thereon pass between them, substanl In testimonywhereofI have signed my naine tially as described. to this specificationin the preseneeoi' two suh- 3. The driven shaft n2, its gear, the shaftm3, seribing witnesses.

its gear yn, and bevel-gears m m2, combined JOHN XV. D. FIFIELD.

5 with the bevel-gears l l2, and screws B B', to Vtliesses:4

operate the form and carrier, or either, sub- HENRY J. NEWMAN, stantallyas described. XV. E. HoLT.

